From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759940AbaLLI3J (ORCPT ); Fri, 12 Dec 2014 03:29:09 -0500 Received: from mailout1.samsung.com ([203.254.224.24]:38563 "EHLO mailout1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759850AbaLLI1w (ORCPT ); Fri, 12 Dec 2014 03:27:52 -0500 X-AuditID: cbfee691-f79b86d000004a5a-5b-548aa6f6d013 From: Chanwoo Choi To: myungjoo.ham@samsung.com, kyungmin.park@samsung.com Cc: kgene.kim@samsung.com, rafael.j.wysocki@intel.com, a.kesavan@samsung.com, tomasz.figa@gmail.com, b.zolnierkie@samsung.com, k.kozlowski@samsung.com, cw00.choi@samsung.com, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org Subject: [RFC PATCHv3 4/7] devfreq: event: Add documentation for exynos-ppmu devfreq-event driver Date: Fri, 12 Dec 2014 17:27:29 +0900 Message-id: <1418372852-12454-5-git-send-email-cw00.choi@samsung.com> X-Mailer: git-send-email 1.8.5.5 In-reply-to: <1418372852-12454-1-git-send-email-cw00.choi@samsung.com> References: <1418372852-12454-1-git-send-email-cw00.choi@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrDLMWRmVeSWpSXmKPExsWyRsSkUPfbsq4Qg8uTBS0er1nMZLFxxnpW i+tfnrNazD9yjtXi9QtDi94FV9kszja9YbfY9Pgaq8XlXXPYLD73HmG0mHF+H5PF7cYVbBaP V7xlt1i16w+jA5/Hzll32T0W73nJ5LF5Sb1H35ZVjB6fN8kFsEZx2aSk5mSWpRbp2yVwZWz4 +5GxYLpoxfvJ19kaGDcLdjFyckgImEhsWPGdFcIWk7hwbz1bFyMXh5DAUkaJlVPbmbsYOcCK lu71gYgvYpS43XofqqiJSeLcrP3MIN1sAloS+1/cYAOxRQTMJXYt/QlWxCxwiUli+8weJpCE sECyxJQDjYwgNouAqsT7o1PYQWxeAVeJ/Q/vM0KcoSCxbPlMsJM4BdwkXlzdwAhyhRBQzc8l dSAzJQTOsUssuTqFFWKOgMS3yYdYIC6Vldh0gBlijKTEwRU3WCYwCi9gZFjFKJpakFxQnJRe ZKpXnJhbXJqXrpecn7uJERgpp/89m7iD8f4B60OMAhyMSjy8L1K7QoRYE8uKK3MPMZoCbZjI LCWanA+Mx7ySeENjMyMLUxNTYyNzSzMlcV4d6Z/BQgLpiSWp2ampBalF8UWlOanFhxiZODil GhgP3ZnksXWd4iT2qXGlJ1PtfC+t0/sRm9WTZObVdap5tre/pq32j+MF50TNuxitpjxoCK39 LxKTmd22cQ/vVb09yqK2PRc+TNN6tMP+1ruJj7krFiXb528U6mOZFjfJ78zZx39WxCf47zS+ FX7mFUvFSYsHRV7HlCUTmJxd3/971+522Xpl/WQlluKMREMt5qLiRADl+9ujjwIAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrGIsWRmVeSWpSXmKPExsVy+t9jAd1vy7pCDJ7+4LB4vGYxk8XGGetZ La5/ec5qMf/IOVaL1y8MLXoXXGWzONv0ht1i0+NrrBaXd81hs/jce4TRYsb5fUwWtxtXsFk8 XvGW3WLVrj+MDnweO2fdZfdYvOclk8fmJfUefVtWMXp83iQXwBrVwGiTkZqYklqkkJqXnJ+S mZduq+QdHO8cb2pmYKhraGlhrqSQl5ibaqvk4hOg65aZA3SokkJZYk4pUCggsbhYSd8O04TQ EDddC5jGCF3fkCC4HiMDNJCwhjFjw9+PjAXTRSveT77O1sC4WbCLkYNDQsBEYuleny5GTiBT TOLCvfVsXYxcHEICixglbrfeh3KamCTOzdrPDFLFJqAlsf/FDTYQW0TAXGLX0p9gRcwCl5gk ts/sYQJJCAskS0w50MgIYrMIqEq8PzqFHcTmFXCV2P/wPiPEOgWJZctnsoLYnAJuEi+ubmAE uUgIqObnkroJjLwLGBlWMYqmFiQXFCel5xrqFSfmFpfmpesl5+duYgTH4TOpHYwrGywOMQpw MCrx8L5I7QoRYk0sK67MPcQowcGsJML7NwooxJuSWFmVWpQfX1Sak1p8iNEU6KiJzFKiyfnA FJFXEm9obGJmZGlkbmhhZGyuJM6rZN8WIiSQnliSmp2aWpBaBNPHxMEp1cAo2s7wg1OvYJX2 k8eHmx8fVr1lzyirUFpYo5zMlhp7OunR05P2tw+dv7heSiZ9Y/Du1OolegoxejseO5//U/B+ gaXz8zeBuS/v9lmZqudYNM01j2da/OT3h8qrzrNFP3EHuLho6qpvtmN+plz3qSVpysoJ/B4W pWFFPuesC2r4D+tM+bhwW6YSS3FGoqEWc1FxIgAeZDvJ2QIAAA== DLP-Filter: Pass X-MTR: 20000000000000000@CPGS X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch adds the documentation for Exynos PPMU (Performance Profiling Monitoring Unit) devfreq-event driver. Cc: MyungJoo Ham Cc: Kyungmin Park Signed-off-by: Chanwoo Choi --- .../bindings/devfreq/event/exynos-ppmu.txt | 56 ++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 Documentation/devicetree/bindings/devfreq/event/exynos-ppmu.txt diff --git a/Documentation/devicetree/bindings/devfreq/event/exynos-ppmu.txt b/Documentation/devicetree/bindings/devfreq/event/exynos-ppmu.txt new file mode 100644 index 0000000..f7e50e5 --- /dev/null +++ b/Documentation/devicetree/bindings/devfreq/event/exynos-ppmu.txt @@ -0,0 +1,56 @@ + +* Samsung Exynos PPMU (Performance Profiling Monitoring Unit) device + +The Samsung Exynos SoC have PPMU (Performance Profiling Monitoring Unit) for +each IPs. PPMU provides the primitive values to get performance data. These +events provide useful information about the behavior of the SoC that you can +use when analyzing system performance, and made visible and can be counted +using login in each IP (DMC, CPU, RIGHTBUS, LEFTBUS, CAM interface, LCD, G3D, +MFC). The Exynos PPMU driver use the devfreq-event class to provide event data +to various devfreq device. The devfreq device would use the event data when +derterming the current state of each IP. + +Required properties: +- compatible: Should be "samsung,exynos-ppmu". +- reg: physical base address of each PPMU and length of memory mapped region. + +Optional properties: +- clock-names : the name of clock used by the PPMU, "ppmu" +- clocks : phandles for clock specified in "clock-names" property +- #clock-cells: should be 1. + +Example : Examples of PPMU nodes are listed below. + + ppmu_dmc0: ppmu_dmc0@106a0000 { + compatible = "samsung,exynos-ppmu"; + reg = <0x106a0000 0x2000>; + status = "disabled"; + }; + + ppmu_dmc1: ppmu_dmc1@106b0000 { + compatible = "samsung,exynos-ppmu"; + reg = <0x106b0000 0x2000>; + status = "disabled"; + }; + + ppmu_cpu: ppmu_cpu@106c0000 { + compatible = "samsung,exynos-ppmu"; + reg = <0x106c0000 0x2000>; + status = "disabled"; + }; + + ppmu_rightbus: ppmu_rightbus@112a0000 { + compatible = "samsung,exynos-ppmu"; + reg = <0x112a0000 0x2000>; + clocks = <&cmu CLK_PPMURIGHT>; + clock-names = "ppmu"; + status = "disabled"; + }; + + ppmu_leftbus: ppmu_leftbus0@116a0000 { + compatible = "samsung,exynos-ppmu"; + reg = <0x116a0000 0x2000>; + clocks = <&cmu CLK_PPMULEFT>; + clock-names = "ppmu"; + status = "disabled"; + }; -- 1.8.5.5